N 9th St Air Quality
Monitoring Station
· Center City, United States
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
26
3am
28
21
21
6am
14
14
14
9am
21
21
14
12pm
14
14
14
3pm
14
14
—
6pm
—
—
—
9pm
—
—
—
12am
—
—
Station readings
26
28
CAMS model
adj -13
34
34
34
34
27
27
27
34
34
27
27
27
27
27
27
Air Quality Forecast (24h)
PM2.56.8 µg/m³
✓ WHO
Good
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32
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Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-08T06:37 UTC.